//The MIT License

//Copyright (c) 2009 Lluis Sanchez, Nick Darnell

//Permission is hereby granted, free of charge, to any person obtaining a copy
//of this software and associated documentation files (the "Software"), to deal
//in the Software without restriction, including without limitation the rights
//to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//copies of the Software, and to permit persons to whom the Software is
//furnished to do so, subject to the following conditions:

//The above copyright notice and this permission notice shall be included in
//all copies or substantial portions of the Software.

//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//THE SOFTWARE.

using System;
using System.Reflection;
using System.Reflection.Emit;

namespace Polymorph
{
    /// <summary>
    /// The <see cref="CodeVariableDeclaration"/> class is used to represent a locally
    /// declared variable in a method.
    /// </summary>
    public class CodeVariableDeclaration : CodeStatement
    {
        private CodeLocalReference m_var;

        /// <summary>
        /// Initializes a new instance of <see cref="CodeVariableDeclaration"/>.
        /// </summary>
        /// <param name="type">The type to declare the variable as.</param>
        /// <param name="name">The name to assign to the variable declaration.</param>
        public CodeVariableDeclaration(Type type, string name)
        {
            m_var = new CodeLocalReference(type, name);
        }

        /// <summary>
        /// Generates the IL for the local variable declaration.
        /// </summary>
        /// <param name="gen">The generator to use to emit the IL.</param>
        public override void Generate(ILGenerator gen)
        {
            m_var.LocalBuilder = gen.DeclareLocal(m_var.Type);
        }

        /// <summary>
        /// Prints a human readable version of the variable declaration.
        /// </summary>
        /// <param name="cp">The <see cref="CodeWriter"/></param>
        public override void PrintCode(CodeWriter cp)
        {
            cp.Write(m_var.Type.FullName + " " + m_var.Name);
        }

        /// <summary>
        /// Gets the variable reference for this variable declaration.
        /// </summary>
        public CodeLocalReference Variable
        {
            get { return m_var; }
        }
    }
}